The KX‑T7705SX is a corded proprietary desk/extension phone designed for business environments with a Panasonic PBX system—it does not function as a standalone PSTN phone

Large 2‑line LCD (up to 16 digits + date/time)

Supports caller ID, call waiting display, and logs up to 30 recent calls

5‑number redial memory

Flash/hold capabilities

Programmable tone/pulse dialing

Hands‑free speakerphone with volume adjustable across 4 levels

Noise‑reduction technology to ensure call clarity

Supports two phone lines (useful for PBX setups)

Fixed handset-volume; ringer volume selectable (off/low/high)

Wall-mountable and powered directly by the phone line—no external power or batteries neede